$ ./configure --target=x86_64-w64-mingw32 --with-platform=efi --host=x86_64-w64-mingw32
$ make
[...]
In file included from grub-core/osdep/platform.c:4:
grub-core/osdep/windows/platform.c: In function ‘grub_install_register_efi’:
grub-core/osdep/windows/platform.c:382:41: error: taking address of packed member of ‘struct grub_efi_file_path_device_path’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
382 | path16_len = grub_utf8_to_utf16 (filep->path_name,
| ~~~~~^~~~~~~~~~~
Disable the -Wadress-of-packaed-member diagnostic for grub_utf8_to_utf16()
call which contains filep->path_name reference. It seems safe because the
structure is defined according to the UEFI spec and we hope authors did not
make any mistake... :-)
This fix is similar to the fix in the commit 8e8723a6b
(f2fs: Disable gcc9 -Waddress-of-packed-member).
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Robbie Harwood <rharwood@redhat.com>
The function grub_disk_get_size() is confusingly named because it actually
returns a sector count where the sectors are sized in the GRUB native sector
size. Rename to something more appropriate.
Suggested-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Patrick Steinhardt <ps@pks.im>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This modifies most of the places we do some form of:
X = malloc(Y * Z);
to use calloc(Y, Z) instead.
Among other issues, this fixes:
- allocation of integer overflow in grub_png_decode_image_header()
reported by Chris Coulson,
- allocation of integer overflow in luks_recover_key()
reported by Chris Coulson,
- allocation of integer overflow in grub_lvm_detect()
reported by Chris Coulson.
Fixes: CVE-2020-14308
Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
GRUB keeps partition offset and size in units of 512B sectors. Media paths
are defined in terms of LBA which are presumed to match HDD sector size.
This is probably cosmetic (EFI requires that partition is searched by GUID)
and still incorrect if GPT was created using different logical block size.
But current code is obviously wrong and new has better chances to be correct.
Fix potential crash caused by signed vs. unsigned comparison. Negative
length compares as very large unsigned number causing subsequent NULL access.
Make exhaustive search for all BootNNNN variables to find one matching
requested efi_distributor.
